Following CAN-SPAM Act …

Do you use email in your business? The CAN-SPAM Act establishes requirements for commercial messages, gives recipients the right to have you stop emailing them, and spells out tough penalties for violations. It describes in clear language, what is expected of you when sending commercial e-mails.

Each separate email in violation of the law is subject to penalties of up to $40,654, and more than one person may be held responsible for violations. So if you send 500 recipients the same e-mail message, and it is found to be in violation, your costs could be extremely painful.